Fig. 1

image

H.E.S.S. gamma-ray excess count images of RX J1713.7−3946, corrected for the reconstruction acceptance. On the left, the image is made from all events above the analysis energy threshold of 250 GeV. On the right, an additional energy requirement of E > 2 TeV is applied to improve the angular resolution. Both images are smoothed with a two-dimensional Gaussian of width 0.03°, i.e. smaller than the 68% containment radius of the PSF of the two images (0.048° and 0.036°, respectively). The PSFs are indicated by the white circles in the bottom left corner of the images. The linear colour scale is in units of excess counts per area, integrated in a circle of radius 0.03°, and adapted to the width of the Gaussian function used for the image smoothing.

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